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TITLE:
TheGreenBow IPSec VPN Client TgbVPN.sys Denial of Service

SECUNIA ADVISORY ID:
SA36332

VERIFY ADVISORY:
http://secunia.com/advisories/36332/

DESCRIPTION:
Giuseppe 'Evilcry' Bonfa' has discovered a vulnerability in
TheGreenBow IPSec VPN Client, which can be exploited by malicious,
local users to cause a DoS (Denial of Service).

The vulnerability is caused due to a NULL-pointer dereference error
in the TgbVPN.sys kernel driver when handling IOCTLs. This can be
exploited to cause a system crash by sending a 0x80000034 IOCTL.

The vulnerability is confirmed in version 4.61.003. Other versions
may also be affected.

SOLUTION:
Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Giuseppe 'Evilcry' Bonfa'

ORIGINAL ADVISORY:
https://www.evilfingers.com/advisory/Advisory/TheGreenBow_VPN_Client_tgbvpn.sys_DoS.php

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